Did Ibn Taymiyyah and Ibn al-Qayyim permit dedicating the reward of all deeds to the deceased?

Question:
May Allah reward you, Honorable Shaykh. This questioner asks: Is it true that Shaykh Ibn Taymiyyah and his student Ibn al-Qayyim permit dedicating the reward of deeds to the deceased?

Answer:
No, I do not know this about them. The issue is subject to scholarly disagreement. What is established as being dedicated to the deceased is supplication for the dead, charity on behalf of the dead, and Hajj and 'Umrah on behalf of the dead. This is what is mentioned in the evidence. There is no evidence for anything else. However, the school of thought holds that any act of worship one performs and dedicates its reward to a living or dead Muslim benefits them. This requires evidence; you need evidence. The default is that a person's deed is for himself only, as Allah the Exalted said: But the verse is specified by the evidence you have heard: charity, Hajj, or 'Umrah, and supplication. Yes.